00274nam a22001217a 4500082001500000100001600015245003300031250001200064260003900076300001300115942000700128999001700135 a621.384NAT aNathan, Ida aEngineering Electromagnetics a2nd ed. aNew York:bSpringer-Verlag,c2008. a1235p. ; cBK c54136d54133